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IAUC 4305: 1987d

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                                                  Circular No. 4305
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
Postal Address: Central Bureau for Astronomical Telegrams
Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
TWX 710-320-6842 ASTROGRAM CAM    Telephone 617-495-7244/7440/7444


COMET TERASAKO (1987d)
     The following positions have been reported:

  1987 UT            R.A.  (1950)   Decl.        m1     Observer
  Jan. 26.38194   23 30 55.46    -29 22 45.5     8      Shibasaki
       27.37916   23 38 00.9     -28 47 29       7.5    Hayakawa
       27.40208   23 38 10.26    -28 46 36.9     7.5    Seki
       27.43505   23 38 24.01    -28 45 27.4            McNaught
       27.43516   23 38 24.26    -28 45 25.9               "
       28.43576   23 45 17.22    -28 09 17.6            Herald
       28.44340   23 45 20.39    -28 08 57.5              "
       28.44392   23 45 20.70    -28 08 56.5              "
       28.46186   23 45 27.79    -28 08 17.8              "

H. Shibasaki (Tokyo Astronomical Observatory, Dodaira Station).
   Communicated by H. Kosai.
S. Hayakawa (YGCO Hoshikawa and Nagano station).  0.16-m f/3.8
   Wright-Schmidt camera.  Communicated by T. Kobayashi.
T. Seki (Geisei).  Comet somewhat condensed, coma diameter 7'.
R. H. McNaught (Siding Spring Observatory).  University of Aston
   Hewitt Schmidt Satellite 610-mm f/1 Camera.  Assisted by R.
   Persson.  Camera in stationary mode; 1-s exposures.
D. Herald (Kambah, near Canberra).  Only 3 stars used in reduction.

     Preliminary parabolic orbital elements, by the undersigned,
from 7 of the above observations, Jan. 26-28:

         T = 1986 Dec. 25.06 ET      Peri. = 193.95
                                     Node  =  96.43   1950.0
         q =   0.3785 AU             i     =  41.01

     1987 ET     R.A. (1950)  Decl.     Delta      r       m1
     Jan. 20    22 40.52    -32 39.8
          25    23 20.76    -30 10.0    1.314    0.864     7.0
          30    23 55.65    -27 11.6
     Feb.  4     0 25.63    -24 02.5    1.443    1.057     8.0
           9     0 51.43    -20 54.8
          14     1 13.77    -17 55.6    1.620    1.242     9.0
          19     1 33.35    -15 08.5
          24     1 50.70    -12 34.8    1.828    1.421     9.8

     Visual magnitude estimate by D. H. Levy, Tucson, AZ (0.20-m
refl.):  Jan. 27.10 UT, 6.9 (faint sunward elongation about 10' long).


1987 January 28                (4305)            Daniel W. E. Green

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